False. The Sherman Antitrust Act was not used to break up the Pullman Strike. The Pullman Strike of 1894 was a labor protest against the Pullman Company, a railroad car manufacturer, and the actions of its owner, George Pullman. The strike was a response to wage cuts and poor working conditions.
To suppress the strike, President Grover Cleveland deployed federal troops, arguing that the strike interfered with the delivery of U.S. Mail, which was a federal responsibility. The injunction used to justify the intervention was based on the idea that the strike was interfering with interstate commerce, not on antitrust grounds.
The Sherman Antitrust Act, passed in 1890, was primarily aimed at preventing anticompetitive behavior by large corporations and monopolies, rather than regulating labor disputes.
